# Privacy Policy — Fast Markdown Reader

Effective date: 2026-07-17 · Publisher: DubDubDub Corp.

Fast Markdown Reader is a Markdown reader for macOS. It has no analytics, no telemetry,
no crash reporting, no accounts, and no servers of its own.

## What we collect
Nothing. There is no analytics library, no telemetry, and no crash reporting built into the app.
We do not know who has installed it, what documents you open, or how you use it. There is no
account to create and no server that the app talks to for its own purposes.

## Your documents never leave your Mac
Fast Markdown Reader is not a cloud service. Every document you open is read from your Mac and
rendered on your Mac. It is a reader first, but it can edit: if you right-click a block and fix
its Markdown, that change is written straight back to the file on your own Mac. Nothing about a
document's content is sent anywhere.

## The only network activity
- **Remote images your own document asks for.** If a Markdown file references a remote image URL,
  the app fetches that image — because your document asked for it. That request goes to whatever
  host the document names, never to us.
- **Links you click.** Clicking a link opens it in your default browser, same as anywhere else on
  your Mac.

Outside of these two document-initiated cases, the app makes no network requests.

## Mermaid diagrams render fully offline
The mermaid diagram engine is bundled inside the app — no CDN, no network call to render a
diagram. Rendered diagrams are cached on your own Mac, in its temporary folder, and that cache
never leaves your machine.

## Mac App Store build and folder access
The Mac App Store build is sandboxed, as Apple requires. It can only reach files and folders you
pick yourself, and it asks for read and write access to them: read so it can show a document and
its local images, write so that an edit you make can be saved back to your file. If you grant it
access to a folder, that permission is stored on your Mac as a macOS security-scoped bookmark —
it stays on your device and is never transmitted to us or anyone else.

## No personal data processing
Because the app collects nothing, there is no personal data for us to process, store, or share —
no cookies, no tracking identifiers, no advertising.

## Changes to this policy
If this policy changes, we'll update the effective date above; changes are reflected in the app's
GitHub repository history: https://github.com/taekim34/fast-markdown-reader

## Contact
- Privacy questions: biz@ww-w.ai
- Bugs / feature requests: https://github.com/taekim34/fast-markdown-reader/issues